A researcher plans to apply a one-tailed test of significance when analyzing data from a study. Which is true about using this test?
a. The researcher will be unable to predict whether differences are greater than or less than the mean value.
b. This is a nondirectional hypothesis, so values will not have a tendency to vary in a specific direction.
c. This may increase the possibility of a Type I error when evaluating the significance of the findings.
d. This will decrease the possibility of a Type II error when drawing conclusions about the data.
ANS: D
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